Cyana bianca ( Walker, 1856 )

Singh, Navneet, Volynkin, Anton V., Kirti, Jagbir Singh, Datta, Harvinder Singh & Ivanova, Maria S., 2020, A review of the genus Cyana Walker, 1854 from India, with descriptions of five new species and three new subspecies (Lepidoptera: Erebidae: Arctiinae: Lithosiini), Zootaxa 4738 (1), pp. 1-93 : 9

Cyana bianca ( Walker, 1856)

( Figs 11, 12 , 165 , 238 )

Bizone Bianca Walker, 1856 , List of the Specimens of Lepidopterous Insects in the Collection of the British Museum 7: 1684 (Type locality: “Hindostan”).

Type material examined. Holotype (by monotypy) ( Figs 11 , 165 ): male, “Hind[ostan]” / “ Bizone bianca type Walk.” / “ Bianca n.” / “Type” / “226” / “501” / “A. Walker’s type of Bizone bianca 7-1684” / “TYPE (printed) LEP.: No. 429 Bizone bianca Walker (handwritten) HOPE DEPT. OXFORD (printed)” (Coll. OUMNH).

Other material examined. MEGHALAYA: 1 ♂, India, Meghalaya , Dangar, 30.VIII.2014, leg. H.S. Datta (Coll. NZCZSI) ; 2 ♀, NE India, W Meghalaya, Umran , 33 km N Shillong, 26°06’N, 92°23’E, 800 m, 14–23.VII.1997, leg. Sinjaev & Afonin, slide ZSM Arct. 2019 - 332 ♀ Volynkin (Coll. MWM / ZSM) .

Diagnosis. Forewing length is 13–14 mm in males and 18–18.5 mm in females. Cyana bianca is most similar externally to C. juliettae (illustrated by Volynkin & Černý (2019b): fig. 2) and C. carmina ( Figs 13, 14 ), but can be distinguished by the black outer margin of its antemedial line being arcuate, while in C. juliettae and C. carmina that is curved outwards at the anal wing margin. In addition, in C. bianca this margin is stronger curved at costa than that of C. carmina . In the male genital capsule, the valva apex is slightly broader than that of C. juliettae (illustrated by Volynkin & Černý (2019b): fig. 14) and C. carmina ( Figs 166 , 167 ). The vesica shape of C. bianca is most similar to that of C. carmina , but differs by its smaller dorsal medial diverticulum, narrower dorsal distal diverticulum covered with weaker spinules and granulation, larger apical diverticulum, smaller lateral diverticulum bearing narrower cluster of smaller spinules, and less granulated ventral distal diverticulum bearing smaller patch of spinules. The female genitalia of C. bianca are similar to those of C. carmina ( Figs 239 , 240 ), but differ by the longer apophyses anteriores and longer sclerotized anterior section of ductus bursae.

Distribution. India (Meghalaya) ( Walker 1856; Volynkin & Černý 2019b).

Figures

FIGURES 11–18. Cyana spp.: adults. 11, C. bianca, holotype ♂, India (OUMNH); 12, ditto, ♀, India, Meghalaya (MWM/ ZSM); 13, C. carmina carmina, ♂, The Philippines (CKC); 14, ditto, ♀, The Philippines (CKC); 15, C. arorai, ♂, India, S Andaman Isl. (MWM/ZSM); 16, ditto, ♀, India, S Andaman Isl. (MWM/ZSM); 17, ditto, holotype ♀ of C. tripunctata, India, S Andaman Isl. (©NHMUK); 18, ditto, ♀, India, S Andaman Isl. (MWM/ZSM).

FIGURES 164–166. Cyana spp.: male genitalia. 164, C. weerawoothi, Thailand, slide AV3897 Volynkin; 165, C. bianca, holotype, slide OUMNH 2019-1731 Volynkin; 166, C. carmina carmina, The Philippines, slide AV3858 Volynkin.

FIGURES 234–239. Cyana spp.: female genitalia. 234, C. detrita, India, Uttarakhand, slideAV2078 Volynkin; 235, C. coccinea coccinea, India, West Bengal, slide MWM 34418 Volynkin; 236, C. coccinea flavotincta, paratype, India, Assam, slide MWM 34420 Volynkin; 237, C. weerawoothi, Thailand, slide AV3898 Volynkin; 238, C. bianca, India, Meghalaya, slide ZSM Arct. 2019-332 Volynkin; 239, C. carmina carmina, The Philippines, slide AV3859 Volynkin.

FIGURES 167–169. Cyana spp.: male genitalia. 167, C. carmina malacca, Thailand, slide AV3861 Volynkin; 168, C. arorai, India, S. Andaman Isl., slide MWM 34564 Volynkin; 169, ditto, India, M. Andaman Isl., slide MWM 33907 Volynkin.

FIGURES 240–245. Cyana spp.: female genitalia. 240, C. carmina malacca, The Philippines, slide AV3862 Volynkin; 241, C. arorai, two spotted form, India, S.Andaman Isl., slide MWM 34602 Volynkin; 242, ditto, three spotted form, India, M.Andaman Isl., slide MWM 35680 Volynkin; 243, C. abrupta, paratype, India, Assam, slide ZSM Arct. 137/2017 Volynkin; 244, C. puer, India, Meghalaya, slide MWM 34489 Volynkin; 245, C. neopuer, paratype, India, Meghalaya, slide MWM 34468 Volynkin.